Method and system for recovering encrypted partition data of mobile hard disk

The invention provides a mobile hard disk encrypted partition data recovery method and system, and the method comprises the steps: obtaining a disk undistributed region sector set D, for any element D [i] in the sector set, reading data S of which the initial position is D [i] and the length is section of a mobile hard disk, taking an encrypted partition data encryption salt value E, and carrying out the recovery of the encrypted partition data of the mobile hard disk. Performing decryption operation on the S header data and the encrypted salt value E data to obtain decrypted data S '; if S'is DBR data of an effective NTFS partition and the starting position expressed by an element D [i] in a set D is the starting position of a security region P of Storage Security Software, the size of the encrypted partition is obtained, data reading is carried out with the starting positions and the lengths of all sectors in a sector set of the security region P being secure, decryption operation is carried out on the data